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Hoochie [10]
3 years ago
11

Which one has a larger atomic radius cobalt or nickel

Chemistry
2 answers:
Shkiper50 [21]3 years ago
5 0
cobalt has a larger atomic radius
White raven [17]3 years ago
4 0

Answer:

Radius of Cobalt > Radius of Nickel

Explanation:

In general, unionized elements in series with the lower atomic number (#protons) will tend to have a larger radius than those with higher atomic numbers. Therefore Cobalt (Atomic No = 27) would have a slightly larger atomic radius than Nickel (Atomic No = 28). A rule to remember is as atomic number increases in a series of elements the numbers of protons and electrons increase which results in an increase in the nuclear attraction for electrons thereby decreasing the atomic radius of elements.    The following periodic table of atomic radii (in picometers) will support the explanation.

http://ww1.igoscience.com/  Co => 152pm    Ni => 149pm

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a balloon contains 30.0 L of helium gas at 103 kPA. what is the volume of the helium when the balloon rises to an altitude where
stiv31 [10]
Answer:
                V₂  =  123.6 L

Explanation:

According to Boyle's law pressure and volume of a gas are inversely related if amount and temperature are kept constant. For the initial and final states the gas law is given as,

                                                P₁ V₁  =  P₂ V₂     ----- (1)
Data Given;
                   P₁  =  103 kPa

                   V₁  =  30 L

                   P₂  =  25 kPa

                   V₂  =  ?

Solution:

Solving equation 1 for V₂,

                                        V₂  =  P₁ V₁ / P₂

Putting values,
                                        V₂  =  (103 kPa × 30 L) ÷ 25 kPa

                                        V₂  =  123.6 L

Result:
           As the pressure is decreased from 103 kPa to 25 kPa, therefore, volume has increased from 30 L to 123.6 L.
8 0
3 years ago
Describe the phases/states of matter, excluding plasma
Art [367]

Answer:

The three states of matter are the three distinct physical forms that matter can take in most environments: solid, liquid, and gas. In extreme environments, other states may be present, such as plasma, Bose-Einstein condensates, and neutron stars.

6 0
3 years ago
The acid-dissociation constant of hydrocyanic acid (hcn) at 25.0 °c is 4.9 ⋅ 10−10. what is the ph of an aqueous solution of 0.0
vodomira [7]
According to the reaction equation:

and by using ICE table:

              CN-  + H2O ↔ HCN  + OH- 

initial  0.08                        0          0

change -X                        +X          +X

Equ    (0.08-X)                    X            X

so from the equilibrium equation, we can get Ka expression

when Ka = [HCN] [OH-]/[CN-]

when Ka = Kw/Kb

               = (1 x 10^-14) / (4.9 x 10^-10)

               = 2 x 10^-5

So, by substitution:

2 x 10^-5 = X^2 / (0.08 - X)

X= 0.0013

∴ [OH] = X = 0.0013 

∴ POH = -㏒[OH]

            = -㏒0.0013

            = 2.886 

∴ PH = 14 - POH

         = 14 - 2.886 = 11.11
5 0
3 years ago
Which term defines the amount that a solute can dissolve into a solution?
Readme [11.4K]
The correct answer for the question that is being presented above is this one: "C. solubility level." The <span>term defines the amount that a solute can dissolve into a solution is called the solubility level. The higher the solubility level, the faster it dissolves.</span>
6 0
3 years ago
When dissolving gases in water, the amount dissolving (decreases, does not change, increases) when the pressure is increased?
algol13
Increasing because more is being forced into liquid phase
4 0
4 years ago
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